I'm attempting to utilize computed or watch to identify changes in the body's scrollHeight, but for some reason it is not functioning properly.
Below is my code snippet:
computed: {
bodyScrollHeight() {
return document.body.scrollHeight;
}
},
watch:{
bodyScrollHeight: function(newValue) {
this.watchScrollHeight = newValue;
this.myFunction(newValue);
}
},
Link to CodePen Demo: https://codepen.io/chhoher/pen/wvMoLOg
If you want a computed property to be reactive while returning document.body.scrollHeight, simply returning it won't achieve that. You need to find another way to listen for changes and notify Vue accordingly.
One possible method is to continuously check the scrollHeight value by polling it. Here's an example implementation:
new Vue({
data: () => ({
scrollHeight: 0,
interval: null,
}),
mounted() {
this.interval = setInterval(() => {
this.scrollHeight = document.body.scrollHeight;
}, 100);
},
destroyed() {
clearInterval(this.interval);
},
watch: {
scrollHeight() {
// This function will be triggered when the poll detects a change in value
}
},
computed: {
doubleScrollHeight() {
// You can use this computed property which will reactively update with scrollHeight
return this.scrollHeight * 2;
}
}
})
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